Extensible door opening and jamb gage.



n.1. HALLBERG, EXTENSIBLE DOOR OPENING AND .IANIB GAGE.

Patented July 25, 1916.

2 SHEETS-SHEET I.

APPLICATION FILED AUG. Il. 1915.

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EXTENSIBLE DOOR OPENING AND IAMB GAGE.

APPLICATION FILED AUG. 11, 1915. y

Patented July 25,1916.

2 SHEETS-SHEET 2.

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lsaid drawings, and referring to each ele- UNITED sTATEs PATENT OFFICE.

caItL I..IIALLBERG, or GALESBURG, ILLINOIS.

EXTENSIBLE DOOR OPENING AYND JAMB GAGE.

Specification of Letters Patent.

ratentedauiy 25., 191e.

Application led August 11., 1915. Serial No. 44,977.

To all whom t may concern.'

Be it known `that I, CARL J. HALLBERG, a citizen of the United States,residing at Galesburg, in the county of Knox and State of Illinois, haveinvented a new and useful Tool to be Known as an Extensible Door Openingand J amb Gage, of which the following is a specification.

My invention relates to tools for squaring, gaging, paralleling, andholding in set position door-jambs while the door-casing is beingconstructed.

The principal object of the invention is to provide a simple,extensible, practical tool by means of ywhich said operations may beexpeditiously and eficiently accomplished.

The invention consists, substantially, in

tlie improvements hereinafter described.

In the accompanying drawings, which illustrate my invention: Figure l isa plan view of one of the duplicate members of the device; Fig. 2, aninverted plan thereof, turned end-for-end; Fig. 3, a plan view of thedevice in assembled and closed position; Fig. 4, a similar view, thedevice partly eX- tended; Fig. 5 an edge view; Fig. 6, an assembly view,showing details; Fig. 7, a faceview of a door-frame with my improvementsin operative position between the jambs; and Fig. 8, a transversesection illustrating the construction of a door frame and par-` tition,my improvements being shown as applied.

Coming now to a detailed description of j ment by a distinguishingreference characgage-sections eachv of which com` hole 4. qf one of theblades 2 and its arminal projects through the slot 3 of the other blade,while the shank ofthe other bolt rests in said slot and projects throughthe hole 4 of the other blade, and each is engaged by a wing-nut l2.This arrangement 1s such that the blades are maintained constantly,v inparallelism, and inasmuch as the,

heads g are fixed at right angles to the rblades theyalso will be heldin parallelism.

Referring particularly to Fig. l, b, b indicate flooring-boards; c, c,door-jambs standing thereon; d, d, sections of the sub-floor;

e, e, plaster; 7', f, the door-casing head; k,- I.,

vertically arranged pieces of scantling; Z, Z, the lath; and J, J,wedgejshingles used in plumbing and truing up the jambs e. These areshown merely to illustrate a door frame and partition construction.After the jambs c are positioned on the floor-boards b the head f, whichof course has been eut to proper length, is secured in place. The gageis then placed on the boards ZJ between said jambs, it having beenadjusted to the same,

length as the head f, which length will be 'indicated by the inner endof one of the blades 2 on the companion blade, as shown best at a, Fig.8. The wedge-shingles J, J', are then employed to move the jambs to thedesired positions, this being determined by plumbing them. lt willbe'evident that not only will the lower ends of the jambs be spaced thesame distance from each other as are their upper ends but also thattheir faces are maintained parallel if brought snugly against the outerfaces yof the heads 6. The lips i and the bodies of the heads g form asquare or rectangle and together fit y closely over the exposed face andone edge of the j amb, whereby to prevent the latter from turning. Thelip further acts as a stop in positioning the device between thejambsand thereby determines its position.

As has earlier herein been stated, each blade and each head is providedwith a graduated scale. These are arranged on the opposed faces of theelements when assembled, whereby the tool is reversible and a cdimensionreading may be had from either s1 e.

Having thus described my invention, I said bolts, and a cross-head fixedto .each claim as new and desire to secure by Letblade and having anoutwardly turned pro- 10 ters Patent the following, namely zjecnion.

In a tool, e pair of blades each of which CARL J HALLBERG 5 is providedwith :L longitudinally arranged slot, bolts seated each in the body ofone of Witnesses: saidblades and adapted to move in the slot C. A.JOHNSON, of the other, nuts, each engaglng one of CARLCARLSON.

